Evaluation of material models describing the evolution of plastic anisotropy in pearlitic steel
Artikel i vetenskaplig tidskrift, 2020

Rolling contact fatigue cracks often initiate in the highly deformed surface layer of railway rails. However, the behavior of the material in this region is not well known. In an earlier study by the author the behavior of a pearlitic rail steel subjected to large shear deformations was analyzed experimentally. The purpose of the present study is to evaluate the ability of four different material models, based on [Meyer et al. INT J SOLIDS STRUCT, pp. 122-132, vol 130-131, 2018], [Shi et al. INT J PLASTICITY, pp. 170-182, vol 63, 2014], [Qin et al. INT J PLASTICITY, pp. 156-169, vol 101, 2018] and crystal plasticity, to simulate these experiments. The second and third models are formulated into the finite strain framework used in the first model, and advanced kinematic hardening laws are incorporated. To enable such an evaluation, a simulation methodology of the experimental procedure is developed and presented. It is found that the model by Shi et al. could fit the experimental data most accurately. None of the models were able to predict all features observed in the experiments. Further development of constitutive models for evolving anisotropy in pearlitic steels subjected to large shear strains is therefore needed. (C) 2020 Elsevier Ltd. All rights reserved.

Finite strains

Crystal plasticity

Evolving anisotropy

Pearlitic steel

Distortional hardening

Författare

Knut Andreas Meyer

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

International Journal of Solids and Structures

0020-7683 (ISSN)

Vol. 200 266-285

Ämneskategorier

Teknisk mekanik

Annan materialteknik

Metallurgi och metalliska material

DOI

10.1016/j.ijsolstr.2020.04.037

Mer information

Senast uppdaterat

2020-10-01